Page.Disappearing and Page.Appearing will not be raised on android 13-API33

Question

Page.Disappearing and Page.Appearing will not be raised on android13-API33

now how can i know app disappear and appear on android13

public partial class MainPage : ContentPage
{
	int count = 0;

	public MainPage()
	{
		InitializeComponent();
        this.Disappearing += MainPage_Disappearing;
        this.Appearing += MainPage_Appearing;
	}

    private void MainPage_Appearing(object sender, EventArgs e)
    {
        throw new NotImplementedException();
    }

    private void MainPage_Disappearing(object sender, EventArgs e)
    {
        throw new NotImplementedException();
    }

Answer 1

Hello,

now how can i know app disappear and appear on android13

For the Disappearing and Appearing methods, the use case is page navigation events.

Disappearing is raised when the page disappears due to navigating away from the page within the app. It is not raised when the app disappears due to an event external to the app (e.g. user navigates to the home screen or another app, a phone call is received, the device is locked, the device is turned off).

For your use case, it is more recommended to use lifecycle events.

Please refer to the following documentation and code sample:

• App lifecycle.

protected override Window CreateWindow(IActivationState activationState)
{
    Window window = base.CreateWindow(activationState);

    window.Stopped += (s, e) =>
    {
        Console.WriteLine("Stopped");
    };
    window.Resumed += (s, e) =>
    {
        Console.WriteLine("Resumed");
    };
    return window;
}

Best Regards,

Alec Liu.

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